Publication: Temperature dependence of the ionic conductivity in Li_(3x)La_(2/3-x)TiO_(3): arrhenius versus non-Arrhenius
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2003-04-14
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Blochowicz, T.
Gainaru, C.
Rössler, E. A.
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Amer Inst Physics
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Abstract
We report on the temperature dependence of the ionic conductivity at low temperatures in the crystalline lithium ionic conductor Li_(0.18)La_(0.61)TiO_(3). Time domain measurements of the electric modulus have been performed to investigate ion dynamics in the frequency range 1025 – 102 Hz and for conductivity values in the range 10214 – 1028 S/cm. Ionic conductivity shows an Arrhenius temperature dependence below 300 K and down to 120 K, in contrast to the non-Arrhenius behavior found at higher temperatures, demonstrating that the temperature dependence of ionic conductivity in Li_(0.18)La_(0.61)TiO_(3) cannot be described by a Vogel–Fulcher–Tamman law.
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© 2003 American Institute of Physics. The authors thank Professor A. Várez for sample preparation. One of the authors (A.R.) thanks another (E.R.) for his hospitality during the stay in Bayreuth.
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